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Acronym for "Yeah, I bet." Used to shut down a person you don't care for and don't want to speak with.
Bro: Dude man bro, I got so fuckin' tanked last night!

Guy: "YIB."
YIB by AltBr0 April 30, 2011
Related Words
yib yibble YIBT Yiba yibber Yibby yibel Yibin yibo yib yib
A short form for a clothing line from Singapore called 'Youths In Balaclava' that sells sick treads.
Person 1: Hey! Cool shirt dude! Where did you get it?
Person 2: It's from YIB!
YIB by Hardcore Pussy Slayer May 23, 2016
Short for Young Israel Booster - a particular sort of yuppie, often from Eastern USA or Tel Aviv who spends time on the Internet correcting people's wrongful impressions of Israel.
The Yibs flooded the YouTube video's comments pages with assertions that only Israel puts so much effort into reducing civilian casualties through precision strikes and anyone who says otherwise just doesn't understand what it's like to live in constantly threatened Israel.
YIB by Beagle17 January 10, 2009
YIB stands for 'Youth In Black'. a gang of 'chavs' dressed in black balaclavas, hoodies and/or tracksuits.
1. he must belong to YIB
YIB by seeingisbelieving March 26, 2012
"Yours in Brotherhood"

A way for fraternity brothers to close correspondence with another brother, most often in email.

Possibly an imitation of Scouting's common use of "YiS" for "Yours in Scouting".
Dear John,

We're moving the chapter meeting to 4p this Friday.

YiB,

Sam
YiB by term3 October 26, 2010